<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="wall">
        <h1>iPhone Price Comparison</h1>
        <div class="back">
            <ul>
                <li class="xs-max"><span>$1099 ~ $1449</span></li>
                <li class="xs"><span>$999 ~ $1349</span></li>
                <li class="xr"><span>$749 ~ $899</span></li>
                <li class="x"><span>$999 ~ $1149</span></li>
            </ul>
        </div>
        <div class="side">
            <ul>
                <li class="xs-max">iPhone XS Max</li>
                <li class="xs">iPhone XS</li>
                <li class="xr">iPhone XR</li>
                <li class="x">iPhone X</li>
            </ul>
        </div>
    </div>
</body>
</html>